Mechanical movement.



Patented lune 25, 19m.` J. A. LEHRBITTER.

MECHANICAL MOVEMENT (Application led Oct. 15, 1900.)

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No. 677,3!6. Patented lune 25, I90l.

J. A. LEHRRITTER.

E MECHANICAL MOVEMENT.

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(Application led Oct. 15, 1900.)

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JOHN A. LEHRRITTER, OF DENVER, COLORADO.

'M ECHANICAL MOVEMENT.

SPECIFICATION forming' part of Letters Patent N0. 677,316, dated J une25, 1901.

Application iiled October 15,1900. Serial No. 33,176. (No model.)

To a/ZZ- whoml it may concern:

Be it known that I, JOHN A. Lnnnnlrrnn, a citizen ot' the United Statesof America, residing at Denver, in the county of Arapahoe and State ofColorado, have invented certain new and useful Improvements inMechanical Movements; and I do declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, and to thefigures of reference marked thereon, which form a part of thisspecification.

My invention relates to improvements in mechanical movements adapted toproduce reciprocating motion.

The invention is specially intended for use in operatingconcentrating-tables; but it is evident that it may be employed in otherrelations where a movement of this character is required.

The invention will now be described in detail, reference being made tothe accompanying drawings, in which is illustrated an embodimentthereof.

In the drawings, Figure 1 is a top or plan view of my improvedmechanism. Fig. 2 is a section taken on the line aux, Fig. 1. Fig. 3 isa section taken on the line w' w, Fig. 2. Fig. 4 is a section taken onthe line y y, Fig. 2, the parts being shown on a larger scale. Fig. 5 isa section taken on the line z z, Fig. 2. Fig. 6 is a perspective detailview of the carriage shown on a larger scale than in Figs. 1 and 2. Fig.7 is a fragmentary view of the adjustingscrew shown on a larger scalethan in Fig. 2.

The same reference characters indicate the same parts in all the views.

Let the numeral 5 designate a suitable stationary frame, in the rearportion of which is journaled a shaft 6, provided with a crank 7. Oneextremity of a link 8 is connected with the crank 7, while the otherextremity of this link is connected with the lower extremity of a lever9, whose lower portion, as shown in the drawings, is curved rearwardly,as shown at 9, its lower extremity being forked to straddle theextremity of the link. This lever 9 is fulcrumed at its upper extremity,as shown at 10. This fulcrum 10 consists of a pin whose extremities aresupported by the sides 12" of a U-shaped carriage 12. The upper portionof the lever 9 passes between the sides of the carriage. The upperextremity of the lever is provided with an elongated boss 9C, forming abearing through which the fulcrum-pin 10 passes. At a suitable pointintermediate its extremities two links 13 are connected with thelever-one on each side-by a bolt 14, which is iitted into openings inthe link extremities, and pass through a slot 9, formed in the lever.The lever is graduated adjacent this bolt, and by adjusting the bolt thelength of the stroke imparted to the lfable or other apparatus may beregulated. A pointer or indicator 18, formed integral with one of thelinks 13, facilitates accurate adjustment. The two links 13 are providedwith enlarged openings, in which are inserted bushings 13, whichprotrude from the openings to engagement with a nut 131 on one side andthe bolt-head on the other, whereby as the nut is tightened the bushingsprevent the clamping of the links and at the same time tighten the bolton the lever, whereby'it is securely held in the desired position ofadjustment. The stroke imparted by the lever is shorter or longer,according as the bolt is raised or lowered in the slot. The oppositeextremities of the links are connected with the lower extrem'- ity of alever 17 by a pin 18. The lever 17 is fulcrumed on the carriage at itsupper ex'- tremity by a pin 17a and is connected at a suitable pointintermediate its extremities with a draw-bar 19 by a pin 20. The end ofthe draw-bar is forked to straddle the lever. The opposite extremity ofthis draw-bar is connected with a shoe 22, which is attached to a table22 or other apparatus to be operated. The draw-bar extremity passesthrough an opening in the shoe and is connected therewith by two nuts Aand B-one on each side. Rubber cushions O and D are interposed betweenthe shoe and the said nuts. The shoe 22 is provided with a circularflange or collar 22a. The draw-bar also passes through an opening 12h,formed in the forward extremity of the carriage, this opening beingsurrounded by a circular ange or collar 12d. Between the carriage andthe shoe and surrounding IOO the draw-bar a coil-spring 23 is located,its extremities being maintained in place by collars l2d and 22,respectively.

The carriage l2 is inovably mounted on the frame 5 and is adjustable bymeans of a screw 24, which is swiveled in the front extremity of theframe 5 and engages a threaded opening 12J', formed in a depending lug12g, formed on the front extremity of the carriage. The screw 24 is heldin place in the frame by means of a set-screw 25, attached to the frameand engaging a circular groove 24, formed in the screw 2e. It is evidentthat by turning the screw 24: the carriage may be moved back and forthon the frame. By virtue of this adjustment the character of the strokeimparted to the table 22 may be accurately regulated. By moving thecarriage farther back or toward the left (see Figs. l and 2) the time ofmaking the backward stroke or the movement of the table in the directionindicated by the arrow in Figs. l and 2 is increased, while the time ofmaking the forward stroke is diminished. The result of moving thecarriage in the opposite direction is of course the reverse. By virtueof the adjustment of the carriage the character of the reciprocationimparted to the table may be so regulated as to adapt the table to thetreatment of various classes of ores. Under ordinary circumstances thetable should move forward much more quickly than it moves backward, thustheoretically giving the mineral or concentrates an opportunity tosettle during the backward stroke, while the quick forward stroke andsudden stop cause them to travel forwardly on the table a certaindistance at each stroke.

The spring 23, while not indispensable, absorbs any concussion or jarthat otherwise might be incident to the operation, and thus gives to themechanism perfect smoothness of action. During the backward movement ofthe table or its movement toward the left (see Figs. l and 2) the spring23 is compressed, while duringits return or forward movement the recoilof the spring has a tendency to actuate the table.

By virtue of the use of the lever 17 it becomes practicable to move thebolt 14: upward or downward in the slot 9d of the lever 9 withoutvarying the draft plane of the draw-bar. In other words, by using thelever 17 the pull of the draw-bar is uniformly in a horizontal plane,while if the draw-bar were connected directly with the lever 9 the pullwould be either upward or downward from a horizontal plane except whenthe draw-bar was connected at a single point of the slot. Hence thefunction of the lever 17.

Having thus described my invention, what I claim is l. The combinationwith a suitable frame and crank-shaft, of a lever fulcrumed on theframe, a link connecting the shaft-crank with the lever, a second leveralso fulcrumed on the frame, a draw-bar having one extremity connectedwith the last-named lever, and the other extremity with the apparatus tobe operated, the draw-bar extremities lying substantially in ahorizontal plane, and a connection between the levers, to permitadjustment to vary the length of the stroke imparted to the actuatedapparatus.

2. In a mechanical movement, the combination with a suitable frame andcrank-shaft, of a lever fulcrumed on the frame, a link connecting theshaft-crank with the lever, asecond lever also fulcrumed on the frame, alink connecting the two levers, and adjustable to change the stroke, anda draw-bar connected with one of the levers and withthe apparatus to beoperated, the arrangement being such that the extremities of thedraw-bar are maintained in a uniform plane regardless of thestroke-changing adjustment of the mechanism.

3. In a mechanical movement, the combination with a fra-me and a rotaryshaft, of a lever fulcrumed on the frame, a connection between the shaftand the lever whereby the rotation of the shaft oscillates the lever, asecond lever fulcrumed on the frame, a link connecting the two leversone of which is slotted to permit the adjustment of the link to changethe stroke, and a draw-bar connecting the second lever with the table orother apparatus to be operated.

t. The combination with a frame and a rotary shaft, of a carriagemovable on the frame, a lever fulcrumed on the carriage, a connectionbetween the lever and the shaft whereby the rotation of the shaftoperates the lever, a connection between the lever and the apparatus tobe reciprocated, and means for adjusting the carriage to regulate thecharacter of the stroke imparted by the lever.

5. The combination with a frame and a rotary shaft, of a carriagemovable on the frame, a lever fulcrumed on the carriage and operatedfrom the shaft, a draw-bar connected with the apparatus to bereciprocated, a connection between the draw bar and lever whereby themovement of the lever operates the table, and means for adjusting thecarriage to regulate the character of the stroke imparted to the table,so far as the relative time consumed in making the forward and backwardmovement is concerned.

6. The combination with a frame and an operating-shaft, of a carriagemovable on the frame, a lever fulcrumed on the carriage, an operatingconnection between the shaft and the lever, a draw-bar connected withthe apparatus to be reciprocated, a spring interposed between thedraw-bar and carriage, a connection between the draw-bar and leverwhereby the oscillation of the lever actuates the draw-bar, and meansfor adjusting the carriage, to regulate the character of the strokeimparted to the draw-bar with reference to the relative time consumed inmaking the forward and backward movements.

'7. The combination with aframe and a ro- IOO tar)v shaft, of a carriageadjustable on the frame, a lever fnleruxned on the Carriage, al

link connected at one extremity to the lever, a connection between thelink and the sha-ft, whereby the rotation of the shaft operates thelever, a second lever fulerumed on the earriage, a link connectionbetween the two levers, and a draw-bar connected with the seeond lever.

8. The combination with a frame and a crank-shaft, of a carriage movableon the frame, a lever fnlerumed on the carriage, a link connecting thelever with the shafterank, a connection between the lever and theapparatus to be operated, and a screw for adjusting the Carriage on theframe, the said screw being swiveled on one part and engaging a threadedopening formed in the other part.

9. The Combination with a frame and a crank-shaft, of a carriage mountedon the fra-me, a lever fulerumed on the Carriage, a

link connecting the shaft-crank with the lever, another lever fulcrnrnedon the carriage, a link connection between the two levers, a draw-barConnected with one lever, a shoe connected with the table to beoperated, one extremity of the draw-bar being connected with the shoe, aspring surrounding draw-har and interposed between the carriage andshoe, and a screw swiveled on the frame and engaging a threaded openingformed in a depending lug with which the Carriage is provided.

In testimony whereof I afiiX my signature in presence of two witnesses.

JOHN A. LEHRRTTER.' Witnesses:

DORA C. Sinon, MARY C. LAMB.

